Recipe Tips

Preparation

active: 10 mintotal: 10 min

Cook garlic in a medium saucepan of boiling salted water until slightly softened, about 30 seconds. Using a slotted spoon, transfer garlic to a bowl of ice water; let cool.

Return water in saucepan to a boil. Cook watercress, mint, and parsley just until wilted, about 15 seconds; drain. Transfer watercress and herbs to ice water; let cool. Drain watercress, herbs, and garlic and squeeze between paper towels to remove as much moisture as possible; coarsely chop.

Purée watercress, herbs, garlic, tahini, lemon juice, 1 tsp. salt, and ¾ cup water in a blender until smooth, thinning with more water as needed to reach desired consistency; season with salt and more lemon juice, if desired.

DO AHEAD: Sauce can be made 3 days ahead. Cover and chill. Shake before using.